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A couple is getting married on June 20th at an outdoor ceremony. In recent years, it has rained only 5 days in June. Unfortunately the weatherman has predicted rain for that day but he is known to forecast rain incorrectly 10% of the time. Do you think it's going to rain on their wedding day?
Random sample of five North American adult is more than 7 hours a day? What is the probability that in random sample of 5 north American adults, all watch television more than 7 hours a day?
let X have one of the following distributions: if the prior probabilities are P(H0)= P(HA) which outcomes favor H0? What prior probabilities correspond to the decision rules with a= 0.2 and a =0.5
In hypothesis testing, the level of significance is? When would you use a t test and when would you use an f test ? You are interested in the assumption that adult students earn better grades than traditional students.
Can you conclude that information in article is untrue? Use 0.05 significance level. Find out p-value and explain its meaning.
Shank's Inc., a nationwide advertising firm, wants to know whether the size of an advertisement and the color of the advertisement make a difference in the response of magazine readers.
Categorize the following as the example of nominal, ordinal, interval, or ratio level of measurement, and define why it represents this level: marital status of company's employees.
What is the population mean? What is the best estimate of that value?
Sample data in a goodness-of-fit test are compared with __________. A. a predetermined or historical standard for the variable being studied
System data for a job shop revealed that the average time spent by a job in the shop was approximately n = 5 working days. Construct a statistical test using a level of significance of alpha = 0.05
Find a 95% confidence interval estimate of the average salary for all chemists at the Dull Chemical Company. Assume that chemists' salaries are normally distributed.
Using one mean t test to determine whether or not to support the claim - hypothesis test that WORKS THE SAME as the z-test
A committe studying employer-employee relations proposed that a rating system be adopted. Each employee would rate his or her inmediate supervisor and in turn the supervisor would rate each employee.
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